Dental swaging-machine.



Nrrn TATES Patented May 12, 1903.

FFIGE.

DENTAL SWAGlNG-MACHIN E.

sPEcIFIeA'rIoN forming part r Letters Patent No. 727,811, dated May 12,1903.

Application filed Maroh2 g1902. Serial No. 99.789. on model.)

To all whom it may concern:

Beit known that I, CHAPIN F. LAUDERDALE, a citizen of the United States,residing at Milwauiree, in the county of Milwaukee and State ofWisconsin, have invented a new and usefill-Dental Swaging Device, ofwhich the following is a specification.

This invention relates to certain improvements indevices of that classemployed for swaging or shaping sheet metal inthe formation of crownsand analogous articles indental work, and has for its principal objectto provide a simple, efficient, and inexpensive swaging device in whichthe various members may be readily separated, the lower die member beingarranged in the form of a readily-removable cup or ring, which willpermit of the ready interchange of dies or the insertion of artificialteeth.

A further object is to so construct the striking member or thenpper diemember, to which pressure or other force is applied, as toprevent thesame from rebounding and displacing the metallic plate being swaged.

With these and other objects in view, the invention consists irrthenovel construction and arrangement of, parts-hereinafter described,illustrated in the accompanying drawings, and particularly pointed outin'the appended-claims. I

In the drawings, Figure 1 is a sectional ele- .-vation of a swagingdevice constructed in accordance witlr my invention, illustrating theemployment of a cup-like die-receiving body having a teo'thweceivingsurface or bed of wax-likematerial. Eig. 2 is a perspective view of sahlcup membendetached. Fig. 3 is a View similar to Fig. 1, illustrating theswa ing device as. employed in connection with a dieformed of castmetal. Fig. 4: is a detail perspective view of sifclicast-metal die andis holding-ring. Fig. 5 is a sectional view of the die-holding ring,illustrating the method of forming a matrix, a tooth-form being placedon a fiat surface at a pointwithin the ring and the latter then filledwith fusible material.

Fig. 6 is a detached perspective view of the removable plunger orstriking member.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures of the drawings. a 10 indicates acylinder open at both ends ing sufiiciently close to prevent any lateralmovement of the die member, but permitting the separation of thecylinder from the die member when it is necessary to adjust a piece ofmetal to be swaged or to change the die or matrix.

The die member, as shown in Figs. 1 and 2, is in the form of a cuphaving a recessed upper surface in which is placed a wax-like body 12,the material employed being hard at ordinary temperature and readilysoftened by the application of heat, so that it may receive animpression of a tooth-surface and act as a matrix for the swaging of aplate, or it may be employed as a retaining medium in which to embedartificial teeth for the purpose of adapting metal to the surfacethereof,

the die or matrix being readily changed when necessary.

The lower die member maybe provized with a. ring 11, asindicated inFigs. 3, 4, nd

5, said ring acting as a support for a;'body.-

12of readily-fusible metal, in which a-jdie'or matrix may be formed inany suitable man 1 nor. A convenient method of forming amatrix fromfusible metal is illustrated in. Fig.

5, the open-ended ring being placed" alfdllt d suitable dieasuch as atooth or other object,

and the fusible metal poured in until the ring is filled, after whichthe ring is inverted and placed in position in the lowerend of thecylinder 10. The cup and ring may be intel-changed in accordance withthe character of the work to be performed, and as the cyl- I inder anddie are readily separated the sheet metal to be swagedmay be accuratelyadjusted in position.

One'of theprincipal objects of the pres ent invention is to provide theupper die member or plunger with a mass of yielding pliable materialwhich will readily conform to the surface of the tooth or other die ormatrix and will exert substantially equal pressure on each portion ofthe surface thereof, thereby swaging the sheet metal accurately to allsurfaces whether undercut orotherwise, the die or matrix being firmlysupported and the risk of breakage reduced IQO to a nini-mum. The upperplunger 14 fits snugly within the upper end of the cylinder and projectsthereabove for a sufficient distance to permit it being struck by amallet, and in its lower face is a recess containing a rubber or otheryielding body 15, adapted to conformto the surface of the die or matrix.The lower portion of this rubber-like mass projects below the lower endof the plunger, and its normal diameterif unconfined by the cylinder isgreater than the diameter of the plunger, as illustrated in Fig. 6.Owing to the increased diameter of the yielding material andits inherenttendency to spread to its normal or original diameter, the material willpress'closely against the walls of the cylinder and will hold theplunger in any position to which it may be moved.

\Vith a device constructed in accordance with myinventiou the plungermay be struck a series of blows by a mallet and will remain in theposition to which it is moved after each blow, all tendency to reboundbeing prevented.

While, the construction herein described, and illustrated in theaccompanying drawings, is the preferred form of the device, itis obviousthat various changes in the form, proportions, size, and minor detailsof the structure may be made without departing from the spirit orsacrificing any of the advantages of my invention.

Having thus described my invention, what I claim is- 1. A swaging devicecomprising in combination, a cylinder, a lower die member having afusibledie .or matrix member, and a plunger guided within the upper endof the cylinder and having on its lower end a yielding body adapted toconform to said die, said yielding body being arranged partly in arecessin the lower end of the plunger and proplunger in any position towhich it may be adjusted, said die member and plunger being removablefrom opposite ends of the cylinder.

2. A dental swaging device, comprising in combination, a cylinder, alower die member readily removable therefrom, and having a fusible dieor matrix member, a plunger guided within the upper portion of thecylinderand having an upper striking-surface above the top of saidcylinder, and a yielding body carried by the lower end of the plungerand adapted to conform to the die member, said yielding body beingarranged partly in a recess in the lower end of the plunger andprojecting below the end thereof, the lower portion of said yieldingbody having an original or normal diameter greater than the bore of thecylinder and when compressed within the cylinder serving as a means forholding the plunger in any position to which it may be adjusted, saiddie member and plunger bea ing loosely disposed in and readily removablefrom said cylinder.

3. A dental swaging device comprising in combination, a cylinder, alower die member carried thereby, a plunger of a diameter approximatelyequal to the bore of the cylinder and guided therein, and a yieldingbody carried bythe lower end of said plunger and adapted to conform tothe die member, said yielding body being arranged partly in a recess inthe lower end of ,the plunger and projecting below the end -thereoflthelower portion of said yielding bbdy having an original or normaldiameter greater than the bore of the cylinder.

4Q In a device of the class specified, the combination with acylinderand die, of a plunger adapted tosaid cylinder, said plungerhaving a recessed lowerend, and a yielding swagingbody arranged in saidrecess and extending below the end of the plunger, the lower portion of.said yielding body having an original or normal diameter greater thanthe bore of the cylinder and when compressed within said cylinderserving as a means for holding the plunger in any position to which itmay be adjusted.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

; CHA PIN F. LAUDERDALE.

